Rotary pump.



PATENTED SEPT. 19,v 1905.

W. SMITH.

ROTARY PUMP.

APPLICATION FILED APR.18,1903.

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NI'IF STATES ,AIFNI OFFICE.

ROTARYy PUIVEP.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed April 18, 1903. Serial No. 153,337.

To all whom, t may concern:

Be it known that I, WILLIAM SMITH, a subject of the King of Great Britain and Ireland, residing at 141 Leytonstone road, Stratford, London, England, have invented a Rotary Pump, of which the following is a specification. This. invention relates to rotary machines applicable as moto-rs, pumps, blowers, exhausters, and meters, and has Jfor its object to provide an eiiicient machine of simple and inexpensive construction.

According to the invention the casing of the machine is caused to rotate or to be rotated and is provided with a series of piston-flaps which ride upon an abutment within the casing in such manner that the flaps are maintained in contact with the periphery of the abutment upon the relative rotation of the casing, so that when the'machine is used as a pump the water or liquid is carried from one side of the abutment, where it enters, to the other side of the abutment, where it leaves.

The abutment is advantageously made integral with a trunnion coaxial with the rotating casing and may be supported by means of a single or double bracket, the trunnion being provided with a partition forming compartments communicating with the respective sides of the abutment.

Otherconstructional 'features of importance are comprised in the invention and are hereinai'ter more particularly described.

In the accompanying drawings, Figure 1 is a front view oi' a hand-operated pump provided according to the invention with the casing shown in section. Fig. 2 is a longitudinal central sectional view of the invention with the base shown in elevation. Fig. 3 is a central sectional view of the invention looking downward. Fig. 4 is a front elevation of a constructional modification, showing the casing in section; and Fig. 5 is a central sectional view looking downward on Fig. 4.

In carrying theinvention into effect in its application to a rotary pump, as illustrated in Figs. l to 3 of the accompanying drawings, I provide a rotating casing, which is conveniently7 formed of two side plates a and 7) and an intermediate ring c, which latter is tightly pressed between the side plates a and o, the

latter being bolted together by means of bolts CZ, as illustrated. The, rotating casing thus constituted is mounted upon a hollow trunnion c, which is provided with a central partition fand at one extremity is formed as an abutment g. The extremity e of the trunnion is received within a corresponding recess in the side plate of the casing, and lateral ports /L and c' are provided on each side of the abutment, communicating, respectively, with the compartments formed in the trunnion by the partition f. The abutment g is formed as a radial abutment-that is to say, as an abutment reaching from a central position in the casing to the inner periphery of the casing-so as thus to form radial sides within which the respective inlet and outlet ports t and t' may be provided of relatively great length and of as great a width as may be permitted. The formation o1e the inlet and outlet ports of relatively great length is absolutely essential to theinvention, so that, upon the one hand, the blades in passing along the face of the abutment within which the inletport is formed may induce a suction by their travel along a considerable extent of the whole radial face of the abutment, so that the space between each of the blades will thus be' practically wholly filled and so as to permit or' the liquid being accessible tothe spaces between the respective blades from the moment their forward extremities emerge from under k the extremity of the abutment, while, on the other hand, the relatively long outlet-port is in the same way essential for the proper discharge of the liquid contained between the respective bladesin the passage of the blades along the face of the abutment within which the outlet-port c' is formed, as otherwise part of the liquid carried between the respective blades would be brought down past the outlet and carried around in the casing. The side plate c is advantageously provided with a boss a' for carrying a bush or gland j and packing 1, by which a tight joint may be screwed between the side plate a and the trunnion. The trunnion on its free extremity is provided with a two-way fitting Z, the one part Z' serving as the outlet, while the part Z2 serves as the inlet, communicating, respectively, with the outlet and inlet compartments formed in the trunnion by the partition f.

rlhe ring c is reduced at c to permit of the flanges of the respective side plates c and I) passing over and inclosing the lower part of the ring. rIhe lower part of the ring in equidistant positions in circumferential line, which is indicated more particularly in Fig. 1, is provided with a series of almost complete cylindrical holes, each of which leaves a slot on the inner periphery of the ring. These holes IOO IIO

are provided for the reception of the pivot parts a of piston-flaps 0. The piston-flaps are formed of the same size and are made from strips of metal whose upper extremities are formed of a circular shape corresponding to the cylindrical holes provided in the ring c, the said upper extremities iittingin the said cylindrical holes and being maintained in exact position by the side plates.

It will be understood that the slots on the inner vperiphery of the ring are of less width than the diameter of the corresponding holes, so that thus when the pivot parts of the piston-flaps are placed into position on the rim they are retained and are in working permitted to vassume the positions that are determined by their relation to the abutment rlhe rotating casing may bedriven by a belt, or a handlep may be secured to it by means of the plates p' and bolts d in the manner indicatedin Figs. l and 2.

It will be understood that on the rotation of the casing in the direction indicated by the arrow, Fig. l, the piston-flaps 0 force forward the water from the position within the casing adjacent to the inlet-point L. The piston-flaps 0 in succession cut off the inletport, and the liquid contained between the successive piston-flaps is passed forward to the opposite side of the casing, Where it is discharged through the outlet-port e'. No necessity arises for the use of springs or mechanisms for maintaining the pistoii-iiaps in their proper position with regard to the abutment.

Instead of the liquid being drawn and being discharged atthe same end of the trunnion the trunnion may be provided, as illustrated in Fig. so that the inlet may take place at one side and the discharge at the other, as illustrated in that iigure.

In carrying the invention into effect, as illustrated in Fig. 4, I may provide sets of piston-fiaps in reverse positions to permit of the employment of the machine or of the pump to Work in either direction of the casing. As illustrated in Fig. 4, the piston-fiaps 0 o2 are arranged in reverse positions, and by their use the respective inlet and outlet ports may be reversed.

No limitation is placed to the actual form of the piston-flaps. Instead of the simple form illustrated, the piston-Haps may be formed of any other shape or construction and with edges corresponding in shape to the periphery of the abutment.

In the figures the ring c is provided to allow a clear space equivalent to the thickness of the piston-iiaps between the edge of the abutment; but, if preferred, the ring c may be provided with recesses invwhich the pistoniiaps may be caused to lie so that in passing the edge of the abutment the under face of the piston-Hap lies iiush with the inner periphery of the ring. 1n either ease, however, the

piston-taps are formed of a shape corresponding to a cylindrical curvature of the casing and the edge of the abutment is advantageously similarly formed.

rlhe invention is not limited to the employment of a rotary casing, as hereinbei'ore described, as it is obvious that the piston-iiaps might be provided upon a rotating frame within a fixed casing. Similarly the invention is not limited to the employment of a central abutment within the casing, as hereinbei'ore described, as the inlet and outlet ports instead of being provided in the abutment may be provided in thecasing.

The invention is of course not limited to the employment or' the invention in its application to pumps, as it is obvious that it is equally applicable to the other uses to which an ordinary rotary machine is applicablethat is to say, it is also applicable as a motor, blower, exhauster, and meter.

It is obvious that under certain circumstances the casing may advantageously be fixed with the abutment rotating upon an axle.

In small sizes of machines and in machines which are operated at high'speeds springs are advantageously provided in order to maintain the piston-flaps at once in contact with the abutment. These springs are especially necessary also when dealing with thick or vicous liquids.

What I claim as my invention, and desire to secure by Letters Patent, isv

' l. In a rotary pump in combination, a rotating casing, piston-naps freely carried by said casing, a fixed radial abutment within said casing and extending into proximity with the inner periphery of said casing, and radial inlet and radial outlet ports on each side of said abutment, said radial inlet and radial outlet ports being of a length equal to the radius of the cavity in the rotating easing, substantially as described.

2. A rotary pump consisting in combination of a rotating casing, said casing consisting of two side plates and an intermediate ring, said ring carrying partial cylindrical holes near its inner periphery extending completely across said ring, piston-flaps carried by said ring and of a width corresponding to the Width of the said ring, said piston-fiaps having pivot parts which are let into partial cylindrical holes in the ring aforesaid, and a radial abutment within said casing, radial inlet and radial outlet ports on the respective sides thereof, substantially as described.

3.' A rotary pump consisting in combination of a casing, piston-flaps carried b v said casing, a radial abutment within said casing, provided with radial inlet and outlet ports on the respective sides thereof, said radial inlet and radial outlet ports being of a length equal to the radius of the cavity in the rotating casing, a trunnion connected to said abutment,

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a partition dividing said trunnion and abutment into two equal compartments, substantially as described.

4. A rotary pump consisting in combination of a rotating casing, said rotating casing consisting of two side plates and an intermediate ring, said ring being provided with a series of partial cylindrical holes near its periphery, piston-aps carried by said ring, and having pivot parts let into said partial cylindrical holes in said ring, a fixed radial abutment carrying radial inlet and outlet ports, and a trunnion integral with said fixed radial abutment, said trunnion having a boss lying within a recess on one of the side plates aforesaid, substantially as described.

5. A rotary pump consisting in combinascribing witnesses.

- WILLIAM SMITH.

Witnesses:

- FRIDOLIN FREI, JOSEPH LAKE. 

